Version of the game rock, paper scissors.
You can install it on the mobiles of all the friends who are going to participate in the game, it allows you to make decisions or compete through chance.
Being random, it avoids cheating.
The game mechanics are well known, everybody say "Rock, paper or scissors" at same time and press the button.
The stone beats the scissors.
The paper beats the stone.
The scissors beat the paper.
In case of a tie, another round is played with those who have drawn.